http://terminology.hl7.org/CodeSystem/study-type|1.0.0

{
  "description" : "The type of study a statistic was derived from.",
  "compose" : null,
  "package" : "hl7.terminology.r5@6.3.0",
  "date" : "2020-04-09T21:10:28Z",
  "meta" : {
    "lastUpdated" : "2020-04-09T21:10:28.568+00:00"
  },
  "publisher" : "Health Level Seven International",
  "content" : "complete",
  "name" : "StatisticStudyType",
  "copyright" : "This material derives from the HL7 Terminology (THO). THO is copyright ©1989+ Health Level Seven International and is made available under the CC0 designation. For more licensing information see: https://terminology.hl7.org/license.html",
  "experimental" : false,
  "resourceType" : "CodeSystem",
  "title" : "StatisticStudyType",
  "supliment" : null,
  "status" : "draft",
  "id" : "6d5fe883-1d4b-5ea6-8935-4a55d22c522d",
  "valueSet" : "http://terminology.hl7.org/ValueSet/study-type",
  "url" : "http://terminology.hl7.org/CodeSystem/study-type",
  "identifier" : [ {
    "value" : "urn:oid:2.16.840.1.113883.4.642.1.1350",
    "system" : "urn:ietf:rfc:3986"
  } ],
  "concept" : [ {
    "code" : "RCT",
    "display" : "randomized trial",
    "definition" : "randomized controlled trial."
  }, {
    "code" : "CCT",
    "display" : "controlled trial (non-randomized)",
    "definition" : "controlled (but not randomized) trial."
  }, {
    "code" : "cohort",
    "display" : "comparative cohort study",
    "definition" : "observational study comparing cohorts."
  }, {
    "code" : "case-control",
    "display" : "case-control study",
    "definition" : "case-control study."
  }, {
    "code" : "series",
    "display" : "uncontrolled case series",
    "definition" : "uncontrolled case series."
  }, {
    "code" : "case-report",
    "display" : "case report",
    "definition" : "a single case report."
  }, {
    "code" : "RCTandCohort",
    "display" : "mixed RCT and cohort",
    "definition" : "a combination of 1 or more RCTs and cohorts."
  }, {
    "code" : "cross-section",
    "display" : "cross sectional study",
    "definition" : "uncontrolled cohort."
  } ],
  "caseSensitive" : true,
  "version" : "1.0.0",
  "contact" : [ {
    "telecom" : [ {
      "value" : "http://hl7.org",
      "system" : "url"
    }, {
      "value" : "hq@HL7.org",
      "system" : "email"
    } ]
  } ]
}